Notes drink at last match (7)
I believe the answer is:
decider
'last match' is the definition.
'decider' can be an answer for 'match' (I have seen 'Important match' mean 'decider' so perhaps 'match' could also mean 'decider'). I'm not sure about the 'last' bit.
'notes drink' is the wordplay.
'notes' becomes 'de' (two musical notes).
'drink' becomes 'cider' (cider is a kind of drink).
'de'+'cider'='DECIDER'
'at' is the link.
Can you help me to learn more?
(Other definitions for decider that I've seen before include "Final tie-breaker" , ""Golden goal", for example" , "vital match" , "Crucial final game" , "Umpire" .)